Improvement in wood-molding machines



UNITED STATES PATENT OFFICE.

' ALONZO S. GEAR, OF NEIV HAVEN, CONNECTICUT.

IMPROVEMENT IN WOOD-MOLDING MACHINES.

Specification forming part of Letters Patent No. 106,685, dated August23, 1870.

To all whom it may concern:

Be it known that I, .ALoNzo S. GEAR, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new Improvement inWVood-Molding Machine; and I do hereby declare the following, when takenin connection with the accompanying drawings, an d the letters ofreference marked thereon, to be afull, clear, and exact description ofthe same, and which said drawings constitute part of this specification,and represent, in

Figure 1, a front view; Fig. 2, a side view; Fig. 3, a top view; Figs. 4and 5, the two shapes of interchangeable blocks for the form or pattern;Fig. 6, the manner of combining such blocks; and in Figs. 7 and S, thearrangement of a fan on the cutter-spindle.

This invention relates to an improvement in the machine patented to meNovember 2 1869, the object being chiefly to adapt the machine tovarious kinds of work, and particularly to that of carving.

The invention consists, first, in combining with the cutter-shaft,arranged upon a swingin g or double-jointed arm, a guide or governingpoint, arranged so that the movement of the said point over an unevensurface governs the cutter so as to cause a similar surface to bedressed, second, in the construction of a form for paneling or moldingpurposes, of many parts, within a single clamp, and also combining a fanwith and directly upon the cutter-shaft, constructed and revolving so asto direct a strong current of air onto the cutter, to throw the chipsfrom its path.

A is the table, supported in like manner as in my original machine. B isa vertical driving-shaft, upon which is arranged a double or jointedarm, C D, so as to swing over the table, in the head of which isarranged a cuttor-shaft, a.

Upon one side of the machine I arrange a frame, E, with a mandrel, f,above and 0 below, constructed so that the upper mandrel will support apattern, F, and the lower the material G to be carved, corresponding tothe pattern F. The two mandrels are governed, to be kept in a properrelative position, by means of a vertical shaft, g, with a worm workinginto a gear on each of the mandrels. The cutter-spindle swings withinthe frame between the pattern F and work G; and attached to the carriagewhich supports the cutter-shaft is a guiding-point, d, in direct linewith the axis of the cutter. The carriage which carries thecutter-spindle is made to move freely up and down, and supported up by aspring, a hence, when the cutter is moved into the frame and over ablock, G, to be wrought, it is pressed down until the point at strikesthe pattern, then moved over the surface of the pattern, following itsirregularities. The block is out accordingly, so that, whatever theshape of the pattern F, the block G will be cut to correspond. A reverseof the form is produced by inverting the point d to work upon the underside of the form.

As the cutter is swung from right to left to dress the surface of theblock Gr, in order to control the cut, I arrange a segmental rack, H,(see Figs. land 3,) and fix a dog, h, on the lower end of theintermediate shaft, so that, as the part C is swung around, the dog willoperate in the teeth of the said rackas, for instance, starting in theposition seen in Fig. 3, as the arm D is drawn out the dog will fallinto each tooth of the rack; therefore, one out being taken in onetooth, a second cut maybe made in the next tooth, and so on, thusleaving the operator, while the cutter is at work, only to control theswinging of the cutter from right to left.

In some classes of work it may be desirable to incline the frame whichsupports the work. I therefore pivot the frame at on, (see Fig. 2,) sothat it may be swung from right to left, and secured by a pin orset-screw, 1".

hen used for molding or paneling, a form is required, as shown in myoriginal patent, and, in order to make an adjustable and variety form, Iconstruct several blocks, say of two different forms, (denoted in Figs.4. and 5,) and these blocks I combine within a frame, as seen in Fig. 6,making a variety of forms from the same shaped blocks, as denoted by thefour different sides in Fig. 6. To secure these blocks together I make auniversal clamp, formed from two L-shaped parts, 1?, slotted and securedtogether by screws or bolts S. Bymeans of the slots the clamp may beextended or con tracted, as required 5 and this form is placed over thework and applied in like manner as in my original machine.

To throw the chips from the cutter it has been usual to direct awind-pipe onto the cutter to blow the chips away, the wind beingsupplied independently of the cutter. To do this direct by thecutter-spindle, and without additional power, I arrange a fan, 1), uponthe cutter-shaft, directly above the cutter, as seen in Figs. 7 and 8,the blades of the fan curved, so as to direct the air upon the cutter,and with sufiicient force to throw the chips therefrom.

I claim as my invention- 1. In connection with the swinging frame 0 D,the arrangement of the toothed segment H and dog 72, constructed so asto operate in the manner specified.

2. The arrangement upon the cutter-spindle of a fan, fixed upon the saidspindle so as to revolve therewith, with the blades constructed todirect a current of air onto the cutter in the manner described.

A. S. GEAR.

Vitnesses A. J. TIBBITTS, J. H. SI-IUMWAY.

